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Rapid Fire. The thermal mass benefits of concrete in Insulated Concrete Forms (ICF). Amanda L. Webb, SMArchS Graduate Student. ▪ Objective: Understand the role of concrete portion of ICF in reducing building energy use

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The thermal mass benefits of concrete in Insulated Concrete Forms (ICF)

Amanda L. Webb, SMArchS Graduate Student

▪Objective:Understand the role of concrete portion of ICF in reducing building energy use

▪Approach:Whole-building energy model for typical commercial and residential buildings

▪Key findings: Small overall, but reduced peak heat transfer; mass via ICF not optimized

▪Impact: Focus on optimized use of concrete for thermal benefit

With L. Norford and J. Ochsendorf

residential buildings single family multifamily

Residential BuildingsSingle Family & Multifamily

Amanda Webb

Feb 17, 2011

CONCRETE SUSTAINABILITY HUB

major model changes
Major Model Changes

= Most significant changes

*From DOE’s National Renewable Energy Laboratory

**Focus in this analysis on mass benefits of ICF

CONCRETE SUSTAINABILITY HUB

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Peaks reduced

What if we add more concrete?

slide10

e.g., Thermomass

Better in PHX

Could be better with optimized use of interior mass

energy model lca conclusions
Energy Model/LCA Conclusions

Very solid model specifications

Better contextualize our work – NREL, etc.

Infiltration, R-value, and mass benefits of ICF should be considered separately

Infiltration highly climate dependent; mass somewhat climate dependent

Look at optimized use of mass – balance changes for low energy buildings

CONCRETE SUSTAINABILITY HUB

work through aug 2011
Work Through Aug 2011
  • Energy benefits of concrete. Focus: low energy houses.
    • Analysis to find optimum curve for use of concrete in envelope, interior [Hacker 2008, Zhu 2009]
    • Mass vs. insulation tradeoff
    • Range of climates, thermal performance
  • Comfort benefits of concrete [beyond Aug]
    • Control algorithm testing to understand role of concrete in comfort-based HVAC controls

CONCRETE SUSTAINABILITY HUB